EP 2778149 A1 20140917 - METHOD AND DEVICE FOR RECOVERING ETHYLENE DURING PROCESS FOR PRODUCING VINYL ACETATE
Title (en)
METHOD AND DEVICE FOR RECOVERING ETHYLENE DURING PROCESS FOR PRODUCING VINYL ACETATE
Title (de)
VERFAHREN UND VORRICHTUNG ZUR ETHYLENGEWINNUNG WÄHREND EINES PROZESSES ZUR HERSTELLUNG VON VINYLACETAT
Title (fr)
PROCÉDÉ ET DISPOSITIF POUR LA RÉCUPÉRATION D'ÉTHYLÈNE PENDANT UN PROCÉDÉ POUR LA PRODUCTION D'ACÉTATE DE VINYLE
Publication
Application
Priority
- CN 201110357506 A 20111111
- CN 2012084164 W 20121106
Abstract (en)
The present invention discloses a method and a device for recovering ethylene during the process for producing vinyl acetate, wherein a double solvent absorption method composed of an absorbent solution and deionized water is adopted. The method is as follows: introducing an outlet stream as an absorbent solution from the upper section of the feeding plate in an acetic acid tower during the rectification stage of vinyl acetate production; delivering same to the top of the lower section of the ethylene recovery tower by a delivery pump; charging refined gas from the tower bottom of the ethylene recovery tower for contacting with the absorbent solution in a counter-current; delivering the absorption bottom solution to the rectification stage for treatment; the gas continuing to rise to the upper section of the ethylene recovery tower and contacting with the deionized water introduced from the top of the tower in a counter-current; absorbing and removing the acetic acid therein; and discharging the residual inert gas, such as N2, from the top of the ethylene recovery tower. The absorbent solution is a mixture of acetic acid, vinyl acetate and water, and comprises by weight percentage of 50-85 % acetic acid, 5-30 % vinyl acetate and 5-20 % water.
IPC 8 full level
C07C 11/04 (2006.01); B01D 53/14 (2006.01); B01D 53/18 (2006.01); C07C 7/11 (2006.01)
CPC (source: EP US)
B01D 53/1406 (2013.01 - US); B01D 53/1418 (2013.01 - EP US); B01D 53/1487 (2013.01 - US); B01D 53/1493 (2013.01 - US); B01D 53/185 (2013.01 - US); C07C 7/11 (2013.01 - EP US); B01D 2252/103 (2013.01 - EP US); B01D 2252/205 (2013.01 - EP US); B01D 2252/50 (2013.01 - EP US); B01D 2252/504 (2013.01 - US); B01D 2256/24 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2778149 A1 20140917; EP 2778149 A4 20150624; BR 112014011092 A2 20170502; CN 102516006 A 20120627; CN 102516006 B 20140702; JP 2014532734 A 20141208; JP 5864770 B2 20160217; SG 11201402168Q A 20140926; US 2014366729 A1 20141218; US 9636627 B2 20170502; WO 2013067918 A1 20130516
DOCDB simple family (application)
EP 12848642 A 20121106; BR 112014011092 A 20121106; CN 201110357506 A 20111111; CN 2012084164 W 20121106; JP 2014540303 A 20121106; SG 11201402168Q A 20121106; US 201214356602 A 20121106